MediaTranscoding: Re-enable MediaTranscoding service in master.

Bug:145233472
Test: Build and run.

Change-Id: I6c2937e4ce2e91ec37b77421b2269b30ffd13631
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 0e77a35..fa2be6d 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -206,6 +206,7 @@
     media_profiles_V1_0.dtd \
     MediaProviderLegacy \
     mediaserver \
+    mediatranscoding \
     mke2fs \
     monkey \
     mtpd \